09-23-1996 Council Packet - Laserfiche WebLink

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KOCH’S SOIL TESTING P.O.BOX 81 LORETTO.MN 55357 TEL: (612) 479-2637 Edna Albcc Estate 1/2/96 Job Site: 1575 Long Lake Blvd., Orono, Mn. Percolation tests and soil borr.gs were done on the above lot on 11/7/95 what type of drainfield could be installed to replace the current system which m :*eJ^lion rate was 19.9 min./in. and the depth to mottled soil was at 39-48 the enclosed soil borings and percolation tests for the details. Note: the perc. test “many a preTurized sy^t^wlTs^igned for this properly due to the mottled soil level I tiTS'inv^^^^ on 12/27/95 with Mr. Jim Anderson (University of M^e^oTMike Gaffmn and Steve Weekman (City of Orono). Duane ^ner (Duane w “r ExcLting, Rockford. Mn.) and Robert Koch (Koch Soil Testing. Lorettm 1^.) mesenl ^was the general consensus that a 10 inch gravelless trench system could be instafed Three soil borings were taken that day (12/27/95) and mottled «* 42 inches to 48 inches. It was agreed that the gravelless trench system would be ^?delTf r ^avdle'ss on the downhill side should be at least 6 inches into existing soil The soil located in between the trenches should be scarified up with e ° ‘ backlS similar topsoil (black loam) be added into this area to ensure » cova-TepTof 6 inches over entire drainfield area. The decision on when the placemen of topsoU will be done will be up to the contractor/installcr as proper drainage areas wil ~ t-. srS- gal /day water usage with a perc. rate of 19.9 minimch would be of the following Overall size* 750 sq. ft. Total amount of pipe needed: 250 “• xhpp^fnre However, it was felt that only 80% of the pipe would >>e filled with effluent. T the system should be increased by 20% or to a size of 900 sq. ft. Overall drainfield size: 900 sq. ft. r... .-■> «> ■>-. every 2-3 years. This practice will enhance the life of the system. MPCA Certified Roben Koch